1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5b74819af6377322cde9e21c39cd7a07a695cb873ec65b706ea587fafda819. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9549d33-93ff-4035-a7b3-735ee2a6e5da.json and https://artists.proofprofile.net/proofs/artist/a9549d33-93ff-4035-a7b3-735ee2a6e5da.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4e34d301bbb3743d315f21e7b8b33290138f406e19c37d16ab4daf168bdab8. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5AB1769580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f213e7979029bdb94f7ce4c335feb7e5290ee1a9ea177eaafa7ae0673f7f664. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:47:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5AB1783480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527b88737e333ab6bdd61e32d4665e3576b4f00958362355be5cedf1617fdd00. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJZ2552073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc89a2084ac9307f3b2ae63dc235a64682cbd3cef56b1bd79650d9f21e80bcb9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS1978383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd28e782a895239c1d368f6c0d7f8ff6429cb818920f246bba482721fc7f4d47. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAET2043866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a17ee78d2060bf57adfd748e5269e7d5134dc758259aed3167ddcc39005473. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAET2055023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a095e94caddda4e1e36226f610b78a7d1eab4b3d18549cb0588b2e42d21e945. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAET2055094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eca47d412a2c1d1108aec94e85a2aa0ae5e77c3f515e6bdabe29e4b8518953f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADK1720294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1620ece6cf300a2a5f3abe043c6117eb8d8f223ec3bb92d9f07801a56ecb11fa. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADK1720298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af35e4c48e5d4f60b3804dd97cbda9fb1603bd4405fe261e097903cf2428e5a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHO2322230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e13922535e446e9f8a1ebf39f27b06e08f1203fadc6685ba32739d5c017420. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHC2365026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2e4859819a0cfb006d54f8754fc0e51acca26eb3e5a09987c6c74cd6bb0d2a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFJ2188254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3962ba0847b91cc564106438e6109c0b25b1c79086b027ba4d4c04161259b15. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA71552901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa142599d6bab9916d4f88b41ae7c00b0aef31ebdae50d69617b745bdcf54fa52. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM2PV1738850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf714759ddffc6475bb8f14bd0fb6081e1eec6ee842af0fe43909e6f313a5c8f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM2PV1738851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07abb986235b076f118a69e26e6d8a00ea42ffb6c4adb66f8f1e2ea08365d1ef. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM2PV1738852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c41620e5aa3edc718007f1f4e157085c247e4ff834a6a8b247cef2b1e51f14. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG2563963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da12359d57b1570ede8fc1bf3b1c90264fcb5f88e19f17c95f110c13b131b92. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM7282018841.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926f7c908040ffc5b5109b15977c5cfde3df141d269b83ed24865f7482b3a47b. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLRD52212009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766c331effff01b1beb7f214d00a4f545c4c5e6dfbfb79b256179e2cd03e4132. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADK1720752.